HydroSphere Semi-Inground Pools: The In-Ground Look Without the In-Ground Hassle
Author: Brian Lane
Posted In: On Ground (Semi-Inground) Pools
HydroSphere semi-inground pool kits are built for homeowners who want a cleaner, more permanent backyard finish than a traditional above-ground pool—without committing to a fully gunite/fiberglass in-ground project.
On ProPools, the HydroSphere line is positioned as a premium “on-ground / semi-inground” solution: select models can be installed above ground, while others are designed for semi-inground or even completely inground installations.
Quick take:
HydroSphere is a strong fit if you want:
- Flexible install height (above ground, partially buried, or fully buried—model dependent).
- A heavy-duty 52" steel wall, described as galvanized steel with an acrylic “Alpha Shield” coating.
- Saltwater-friendly compatibility, plus free shipping on the ProPools listings.
- Long-term confidence, marketed with a Limited Lifetime Warranty.
- Shapes beyond basic round/oval, including freeform, rectangle, and Grecian.
What makes HydroSphere different?
1) Install it to match your yard (and your desired “profile”)
If your yard slopes, or you want a more built-in aesthetic, semi-inground pools are often a practical middle path: partially in-ground, partially out, or fully in-ground—then finished with decking, pavers, or hardscape.HydroSphere is explicitly marketed around that flexibility. Depending on model and shape, you can bury it partially or completely, and some configurations can remain mostly or entirely above ground.Why this matters: you’re not forcing your backyard into a single “pool must sit here” decision. You’re choosing the finished look first—and installing to match it.
2) A 52" steel wall with a premium coating callout
ProPools highlights the HydroSphere wall as 52" galvanized steel with an acrylic Alpha Shield coating (positioned as a best-in-class coated wall).In plain terms: a semi-inground install places more demands on the wall system than a basic above-ground setup. The HydroSphere positioning is: thicker/stronger system, longer warranty story, and a finish built for longevity.
3) The “details” that make the backyard look intentional
HydroSphere pages call out two finish-focused features that matter once you start thinking about decks and outdoor living.Optional Patent-Pending Radius Top Rail
Instead of choppy, mitered segments, HydroSphere describes a smooth, continuous top-rail design intended to follow the pool shape.Deck-friendly top-rail option (slotting for 5/4 deck boards)
If you’re planning a wrap or partial deck, HydroSphere notes a top-rail option designed to integrate with common decking boards.Bottom line: if the pool is going to be the centerpiece, the trim package matters. HydroSphere is built and marketed with that “built-in” look in mind.
Water depth: what to expect (and how to go deeper)
HydroSphere package pages state the liner is typically a standard flat bottom providing approximately 46" of water depth.Want a deeper feel? ProPools notes HydroSphere liners can be custom made deeper, such as a tapered bottom may be possible.
Exterior finishing: siding, stone, brick—make it look “built in”
One of the most practical HydroSphere callouts is also one of the most overlooked: the exterior can be field-finished for a clean backyard presentation. ProPools specifically mentions using wall “ribs” to customize the exterior with siding, brick, stone, or faux décor.This is the difference between:
- “We bought a pool,” and
- “We built a pool area.”
What’s in a HydroSphere “package” kit?
Package listings repeatedly direct shoppers to the “Items Included in the Package” tab. One example (18' round) shows the kit includes a standard equipment package with key components such as pump, filter, A-frame ladder, sanitation system, and maintenance items (exact components vary by configuration).
Popular HydroSphere picks (with example pricing from ProPools)
Pricing moves with size, shape, and package configuration, but these give a quick sense of the lineup:Round (classic footprint, easiest to plan around)
- HydroSphere 18' Round Package Kit: $7,912.07
- HydroSphere 21' Round Package Kit: $8,870.65
Freeform (the “in-ground look” without committing to in-ground)
- HydroSphere 13' x 22' FreeformPackage Kit: $8,947.46
- HydroSphere 16' x 28' Freeform Package Kit: $9,781.79
- HydroSphere 18' x 32' Freeform Package Kit: $10,326.55
If you want to shop the full HydroSphere collection page directly:
Buyer checklist (use this before you pick a size)
- Decide your finish line first: deck? pavers? landscaping? retaining wall?
- Pick your install profile: mostly above-ground vs. partially buried vs. fully buried (model-dependent).
- Choose shape based on traffic patterns:
- Depth expectations: standard ~46" water depth; ask about taper options if depth is a priority.
- Plan the exterior finish: siding/stone/brick can dramatically upgrade the final look.
*** Bonus Info *** - Three Quick Q&A's
Q1: Can HydroSphere pools be installed fully in the ground?
Yes—HydroSphere kits are marketed for flexible installation. ProPools notes that select models can be installed above ground, while other HydroSphere models are intended for semi-inground or even completely inground installations. In practical terms, that means you can choose how much wall you want visible and then design the surrounding area (decking, pavers, landscaping) around that finished look. Always match your install plan to the specific model and follow the provided installation resources.
Q2: What wall construction does HydroSphere use?
HydroSphere is positioned as a premium 52" steel-wall system. On the HydroSphere collection page, ProPools describes the wall as 52" galvanized steel with an acrylic “Alpha Shield” coating, highlighting it as a top-tier coated steel wall. That’s important for semi-inground applications where durability and long-term corrosion resistance are major considerations. If you’re comparing brands, wall construction and coating are two of the highest-impact differences—especially when you want a more permanent backyard build.
Q3: How deep is the water in a HydroSphere semi-inground pool?
HydroSphere package pages state the liner is typically a standard flat bottom that provides approximately 46" of water depth. If you want more depth, ProPools also notes HydroSphere liners can be custom made for each pool, and a tapered bottom may be possible (they recommend emailing for details). If depth is a deciding factor, confirm your preferred bottom profile before ordering so the liner and build plan align with your goals.
See all HydroSphere Semi-Inground Pools